Split spdmem driver into a bus attachment and a common back-end
probe and ROM decode, to follow similar changes made in OpenBSD:
http://article.gmane.org/gmane.os.openbsd.cvs/94948
http://article.gmane.org/gmane.os.openbsd.cvs/94956
There exists at least one alternative attachment (for SGI IP35
systems; see http://article.gmane.org/gmane.os.openbsd.cvs/94947),
and there could be more in the future.
Thanks to Christoph Egger for pointing out the OpenBSD activity.
This commit is contained in:
pgoyette
parent
8183d39c9c
commit
d41a3cef46
@ -1,4 +1,4 @@
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# $NetBSD: files,v 1.983 2010/03/15 20:35:19 christos Exp $
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# $NetBSD: files,v 1.984 2010/03/24 00:31:41 pgoyette Exp $
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# @(#)files.newconf 7.5 (Berkeley) 5/10/93
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version 20090313
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@ -328,6 +328,13 @@ attach video at videobus
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device lm: sysmon_envsys
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file dev/ic/nslm7x.c lm needs-flag
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# JEDEC standard SPD EPROM
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#
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# (included here so files.i2c can define an attachment)
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device spdmem
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file dev/ic/spdmem.c spdmem
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# I2C device support
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include "dev/i2c/files.i2c"
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@ -1,4 +1,4 @@
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# $NetBSD: files.i2c,v 1.26 2010/02/22 03:50:56 pgoyette Exp $
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# $NetBSD: files.i2c,v 1.27 2010/03/24 00:31:41 pgoyette Exp $
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defflag opt_i2cbus.h I2C_SCAN
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define i2cbus { }
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@ -102,9 +102,8 @@ attach xbseeprom at iic
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file dev/i2c/xbseeprom.c xbseeprom
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# Memory Serial Presence Detect
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device spdmem
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attach spdmem at iic
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file dev/i2c/spdmem.c spdmem
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attach spdmem at iic with spdmem_iic
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file dev/i2c/spdmem_i2c.c spdmem_iic
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# Memory Temp Sensor
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device sdtemp: sysmon_envsys
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122
sys/dev/i2c/spdmem_i2c.c
Normal file
122
sys/dev/i2c/spdmem_i2c.c
Normal file
@ -0,0 +1,122 @@
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/* $NetBSD: spdmem_i2c.c,v 1.1 2010/03/24 00:31:41 pgoyette Exp $ */
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/*
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* Copyright (c) 2007 Nicolas Joly
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* Copyright (c) 2007 Paul Goyette
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* Copyright (c) 2007 Tobias Nygren
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Serial Presence Detect (SPD) memory identification
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: spdmem_i2c.c,v 1.1 2010/03/24 00:31:41 pgoyette Exp $");
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#include <sys/param.h>
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#include <sys/device.h>
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#include <sys/endian.h>
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#include <sys/sysctl.h>
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#include <machine/bswap.h>
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#include <dev/i2c/i2cvar.h>
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#include <dev/ic/spdmemreg.h>
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#include <dev/ic/spdmemvar.h>
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/* Constants for matching i2c bus address */
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#define SPDMEM_I2C_ADDRMASK 0x78
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#define SPDMEM_I2C_ADDR 0x50
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struct spdmem_i2c_softc {
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struct spdmem_softc sc_base;
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i2c_tag_t sc_tag;
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i2c_addr_t sc_addr;
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};
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static int spdmem_i2c_match(device_t, cfdata_t, void *);
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static void spdmem_i2c_attach(device_t, device_t, void *);
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SYSCTL_SETUP_PROTO(sysctl_spdmem_setup);
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static uint8_t spdmem_i2c_read(struct spdmem_softc *, uint8_t);
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CFATTACH_DECL_NEW(spdmem_iic, sizeof(struct spdmem_i2c_softc),
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spdmem_i2c_match, spdmem_i2c_attach, NULL, NULL);
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static int
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spdmem_i2c_match(device_t parent, cfdata_t match, void *aux)
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{
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struct i2c_attach_args *ia = aux;
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struct spdmem_i2c_softc sc;
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if (ia->ia_name) {
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/* add other names as we find more firmware variations */
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if (strcmp(ia->ia_name, "dimm-spd"))
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return 0;
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}
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/* only do this lame test when not using direct config */
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if (ia->ia_name == NULL) {
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if ((ia->ia_addr & SPDMEM_I2C_ADDRMASK) != SPDMEM_I2C_ADDR)
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return 0;
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}
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sc.sc_tag = ia->ia_tag;
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sc.sc_addr = ia->ia_addr;
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sc.sc_base.sc_read = spdmem_i2c_read;
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return spdmem_common_probe(&sc.sc_base);
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}
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static void
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spdmem_i2c_attach(device_t parent, device_t self, void *aux)
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{
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struct spdmem_i2c_softc *sc = device_private(self);
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struct i2c_attach_args *ia = aux;
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sc->sc_tag = ia->ia_tag;
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sc->sc_addr = ia->ia_addr;
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sc->sc_base.sc_read = spdmem_i2c_read;
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if (!pmf_device_register(self, NULL, NULL))
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aprint_error_dev(self, "couldn't establish power handler\n");
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spdmem_common_attach(&sc->sc_base, self);
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}
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static uint8_t
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spdmem_i2c_read(struct spdmem_softc *softc, uint8_t reg)
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{
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uint8_t val;
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struct spdmem_i2c_softc *sc = (struct spdmem_i2c_softc *)softc;
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iic_acquire_bus(sc->sc_tag, 0);
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iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, ®, 1,
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&val, 1, 0);
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iic_release_bus(sc->sc_tag, 0);
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return val;
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}
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@ -1,4 +1,4 @@
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/* $NetBSD: spdmem.c,v 1.18 2010/03/23 12:13:28 njoly Exp $ */
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/* $NetBSD: spdmem.c,v 1.1 2010/03/24 00:31:41 pgoyette Exp $ */
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/*
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* Copyright (c) 2007 Nicolas Joly
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@ -35,7 +35,7 @@
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: spdmem.c,v 1.18 2010/03/23 12:13:28 njoly Exp $");
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__KERNEL_RCSID(0, "$NetBSD: spdmem.c,v 1.1 2010/03/24 00:31:41 pgoyette Exp $");
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#include <sys/param.h>
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#include <sys/device.h>
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@ -44,15 +44,11 @@ __KERNEL_RCSID(0, "$NetBSD: spdmem.c,v 1.18 2010/03/23 12:13:28 njoly Exp $");
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#include <machine/bswap.h>
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#include <dev/i2c/i2cvar.h>
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#include <dev/i2c/spdmemreg.h>
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#include <dev/i2c/spdmemvar.h>
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#include <dev/ic/spdmemreg.h>
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#include <dev/ic/spdmemvar.h>
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static int spdmem_match(device_t, cfdata_t, void *);
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static void spdmem_attach(device_t, device_t, void *);
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SYSCTL_SETUP_PROTO(sysctl_spdmem_setup);
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static uint8_t spdmem_read(struct spdmem_softc *, uint8_t);
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/* Routines for decoding spd data */
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static void decode_edofpm(const struct sysctlnode *, device_t, struct spdmem *);
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static void decode_rom(const struct sysctlnode *, device_t, struct spdmem *);
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@ -67,9 +63,6 @@ static void decode_size_speed(const struct sysctlnode *, int, int, int, int,
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bool, const char *, int);
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static void decode_voltage_refresh(device_t, struct spdmem *);
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CFATTACH_DECL_NEW(spdmem, sizeof(struct spdmem_softc),
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spdmem_match, spdmem_attach, NULL, NULL);
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#define IS_RAMBUS_TYPE (s->sm_len < 4)
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static const char* spdmem_basic_types[] = {
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@ -145,7 +138,7 @@ static uint16_t spdcrc16 (struct spdmem_softc *sc, int count)
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uint8_t val;
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crc = 0;
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for (j = 0; j <= count; j++) {
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val = spdmem_read(sc, j);
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val = (sc->sc_read)(sc, j);
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crc = crc ^ val << 8;
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for (i = 0; i < 8; ++i)
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if (crc & 0x8000)
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@ -156,42 +149,24 @@ static uint16_t spdcrc16 (struct spdmem_softc *sc, int count)
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return (crc & 0xFFFF);
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}
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static int
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spdmem_match(device_t parent, cfdata_t match, void *aux)
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int
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spdmem_common_probe(struct spdmem_softc *sc)
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{
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struct i2c_attach_args *ia = aux;
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struct spdmem_softc sc;
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int cksum = 0;
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uint8_t i, val, spd_type;
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int spd_len, spd_crc_cover;
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uint16_t crc_calc, crc_spd;
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if (ia->ia_name) {
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/* add other names as we find more firmware variations */
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if (strcmp(ia->ia_name, "dimm-spd"))
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return 0;
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}
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/* only do this lame test when not using direct config */
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if (ia->ia_name == NULL) {
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if ((ia->ia_addr & SPDMEM_ADDRMASK) != SPDMEM_ADDR)
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return 0;
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}
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sc.sc_tag = ia->ia_tag;
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sc.sc_addr = ia->ia_addr;
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spd_type = spdmem_read(&sc, 2);
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spd_type = (sc->sc_read)(sc, 2);
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/* For older memory types, validate the checksum over 1st 63 bytes */
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if (spd_type <= SPDMEM_MEMTYPE_DDR2SDRAM) {
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for (i = 0; i < 63; i++)
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cksum += spdmem_read(&sc, i);
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cksum += (sc->sc_read)(sc, i);
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val = spdmem_read(&sc, 63);
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val = (sc->sc_read)(sc, 63);
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if (cksum == 0 || (cksum & 0xff) != val) {
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aprint_debug("spd addr 0x%2x: ", sc.sc_addr);
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aprint_debug("spd checksum failed, calc = 0x%02x, "
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"spd = 0x%02x\n", cksum, val);
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return 0;
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@ -201,7 +176,7 @@ spdmem_match(device_t parent, cfdata_t match, void *aux)
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/* For DDR3 and FBDIMM, verify the CRC */
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else if (spd_type <= SPDMEM_MEMTYPE_DDR3SDRAM) {
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spd_len = spdmem_read(&sc, 0);
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spd_len = (sc->sc_read)(sc, 0);
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if (spd_len && SPDMEM_SPDCRC_116)
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spd_crc_cover = 116;
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else
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@ -221,11 +196,10 @@ spdmem_match(device_t parent, cfdata_t match, void *aux)
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}
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if (spd_crc_cover > spd_len)
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return 0;
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crc_calc = spdcrc16(&sc, spd_crc_cover);
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crc_spd = spdmem_read(&sc, 127) << 8;
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crc_spd |= spdmem_read(&sc, 126);
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crc_calc = spdcrc16(sc, spd_crc_cover);
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crc_spd = (sc->sc_read)(sc, 127) << 8;
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crc_spd |= (sc->sc_read)(sc, 126);
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if (crc_calc != crc_spd) {
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aprint_debug("spd addr 0x%2x: ", sc.sc_addr);
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aprint_debug("crc16 failed, covers %d bytes, "
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"calc = 0x%04x, spd = 0x%04x\n",
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spd_crc_cover, crc_calc, crc_spd);
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@ -238,11 +212,9 @@ spdmem_match(device_t parent, cfdata_t match, void *aux)
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return 0;
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}
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static void
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spdmem_attach(device_t parent, device_t self, void *aux)
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void
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spdmem_common_attach(struct spdmem_softc *sc, device_t self)
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{
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struct spdmem_softc *sc = device_private(self);
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struct i2c_attach_args *ia = aux;
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struct spdmem *s = &(sc->sc_spd_data);
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const char *type;
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const char *rambus_rev = "Reserved";
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@ -251,19 +223,13 @@ spdmem_attach(device_t parent, device_t self, void *aux)
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unsigned int spd_len, spd_size;
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const struct sysctlnode *node = NULL;
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sc->sc_tag = ia->ia_tag;
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sc->sc_addr = ia->ia_addr;
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if (!pmf_device_register(self, NULL, NULL))
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aprint_error_dev(self, "couldn't establish power handler\n");
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/*
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* FBDIMM and DDR3 (and probably all newer) have a different
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* encoding of the SPD EEPROM used/total sizes
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*/
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s->sm_len = spdmem_read(sc, 0);
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s->sm_size = spdmem_read(sc, 1);
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s->sm_type = spdmem_read(sc, 2);
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s->sm_len = (sc->sc_read)(sc, 0);
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s->sm_size = (sc->sc_read)(sc, 1);
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s->sm_type = (sc->sc_read)(sc, 2);
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if (s->sm_type >= SPDMEM_MEMTYPE_FBDIMM) {
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spd_size = 64 << (s->sm_len & SPDMEM_SPDSIZE_MASK);
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@ -292,7 +258,7 @@ spdmem_attach(device_t parent, device_t self, void *aux)
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if (spd_len > sizeof(struct spdmem))
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spd_len = sizeof(struct spdmem);
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for (i = 3; i < spd_len; i++)
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((uint8_t *)s)[i] = spdmem_read(sc, i);
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((uint8_t *)s)[i] = (sc->sc_read)(sc, i);
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#ifdef DEBUG
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for (i = 0; i < spd_len; i += 16) {
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@ -420,19 +386,6 @@ spdmem_attach(device_t parent, device_t self, void *aux)
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}
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}
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static uint8_t
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spdmem_read(struct spdmem_softc *sc, uint8_t reg)
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{
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uint8_t val;
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iic_acquire_bus(sc->sc_tag, 0);
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iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, ®, 1,
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&val, 1, 0);
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iic_release_bus(sc->sc_tag, 0);
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return val;
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}
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SYSCTL_SETUP(sysctl_spdmem_setup, "sysctl hw.spdmem subtree setup")
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{
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const struct sysctlnode *node;
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@ -1,4 +1,4 @@
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/* $NetBSD: spdmemreg.h,v 1.3 2009/02/22 17:28:50 pgoyette Exp $ */
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/* $NetBSD: spdmemreg.h,v 1.1 2010/03/24 00:31:41 pgoyette Exp $ */
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/*
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* Copyright (c) 2007 Paul Goyette
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@ -28,10 +28,6 @@
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/* Constants for matching i2c bus address */
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#define SPDMEM_ADDRMASK 0x78
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#define SPDMEM_ADDR 0x50
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/* possible values for the memory type */
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#define SPDMEM_MEMTYPE_FPM 0x01
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#define SPDMEM_MEMTYPE_EDO 0x02
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@ -1,4 +1,4 @@
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/* $NetBSD: spdmemvar.h,v 1.7 2008/11/22 19:25:38 pgoyette Exp $ */
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/* $NetBSD: spdmemvar.h,v 1.1 2010/03/24 00:31:41 pgoyette Exp $ */
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/*
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* Copyright (c) 2007 Paul Goyette
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@ -514,9 +514,12 @@ struct spdmem {
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#define sm_selfrefresh sm_fpm.fpm_selfrefresh
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#define SPDMEM_TYPE_MAXLEN 16
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struct spdmem_softc {
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i2c_tag_t sc_tag;
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i2c_addr_t sc_addr;
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uint8_t (*sc_read)(struct spdmem_softc *, uint8_t);
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struct spdmem sc_spd_data;
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char sc_type[SPDMEM_TYPE_MAXLEN];
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};
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int spdmem_common_probe(struct spdmem_softc *);
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void spdmem_common_attach(struct spdmem_softc *, device_t);
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